*4.4. Preparation of ALG/G/NZ and ALG/G/TO@NZ Active Films*

A quantity of 2 g ALG and of 1 g G was spread into 100 mL of distilled water and heated until a homogeneous hydrogel was obtained. An appropriate amount of NZ or TO@NZ powder was dispersed in 10 mL of distilled water using a glass beaker. Then, the homogeneous ALG/G hydrogel was added gradually in the NZ or TO@NZ suspension and vigorously stirred for 2 h. The obtained ALG/G/NZ and ALG/G/TO@NZ hydrogels were then spread in petri dishes of 11 cm diameter and dried at 25 ◦C. The obtained films were pilled of and stored further in a desiccator at 25 ◦C and 50 %RH. In Table 5, the code names and the amounts of ALG, G, NZ, and TO@NZ, which were used to obtain such films, are summarized.


**Table 5.** Code names and amounts of ALG, G, NZ and TO@NZ used for the preparation of films.
